P2X receptors are Ca2+-permeable, ligand-gated cation channels, which are activated by ATP. In arteries, including the rat small pulmonary artery (SPA), they elicit vasoconstriction (Chootip et al., 2002), which is dependent upon extracellular Ca2+. The aim of this study was to determine the relative contributions of Ca2+ influx via the P2X receptor pore and voltage-dependent CaV1.2 (L-type) Ca2+ channels, and the role of Ca2+-induced Ca2+ release (CICR) in P2X receptormediated contractions of rat SPA.
|Publication status||Published - May 2008|
- Ca2+-signalling pathways
- receptor-induced contractions
- small pulmonary artery
- ligand-gated cation channels